Storage battery



July l1, 1,930. E. D. HAWK n STORAGE BATTERY Find July 6, 1928 INVENTOR iatentedgfluly 1, i

y um@ Sm-ES Y ERNEST n. `11Awx,on NEWCASTLE, yifniv .L

y WnssELnaRusTnE, or rirrshim applicatie; med `July e,

`My invention refers to an improvement in storage batteries,y and particularly to a-cov-- ering pad thereforashereinafter described. Thepurpose and Object ofltheimprove` ment is toV provide f a Ysimple andeiicient means forl retaining theV electrolyte within the cell at all times, while continuouslyprei `venting and retarding rthe' escape of gasv ory y the possibility of flashing. Whilefthe construction of the pad is such as-'to notentirely prevent any passage of'gas whatever, it is suiiicientlyporous to allowv escape of surplus o accumulation 'under slight pressure.

The invention is illustrated in connection with a standard or ytypical Aforni of storage battery, as illustrated in the accompanying drawings, inwhich:

Fig. lis a -sectlonal view part eleva- `v tion,l showing the `constructionofthe pad as '2 applied;

Fig. 2 is aplan view ofeFig. 41, with the cover removed; Y l 1 l f Fig. 3 is a perspective view of onefof the improved pads, detached.

vReferring to thev drawings,

2 is the casing lof the battery, of rectangular l:form and of,4

. suitable insulatingmaterial as hard rubber, for containing the usual battery elementsland 3 the electrolyte. The casing '2 .is provided .i secured upon or insertedwithin thegupper :terminal edges of the casing, preferably with lany suitable packing or sealing material/.1a.

and having intervening clearance space and a' filling opening, as shown. y Y p The severalplates y5 and 6.of opposite po- -larity are alternately placed withinv the caso ing with the usual interveningspacers7, 'and r. Thereafter with a coveror top 3 of insulating material` immersed in the usual body of liquid 'electro-4 Suitable. materia-1f.

eempesten eff resi meubel-"i151 is ,55 Miniature ef,.1bu1nt; kiesel'g'uhr, French chalk,"and a 'dilute solutionof sulphurioacid.

hefmxtueeotheiretiand seeeildelements i -efiinlthe lpteperten@efaaheut tweaparte les" yi j weight ef..kieSelsuhL-.teifene partei French Challis which are .eemmnuted er zpillverli'lzed;

ithereughlyim'xed together, yand then. n- -'greetedwthfdlutegsulphure'aeid efepprex- @telai-1,50 ,Spee-iii@ gravity '-juSt-eueiently 1 -telfenu athieklpasteabout:theeQneiSteeey ..165`V of putty.

'l-'lille' mixture asithuemefleisithlen formed radffermin afsutablevmeld, vmide' .@Pteeeuref-whefeby tegehepe it'nte the 'desred '1, 1 y ad111e111911e f9.1? easy @Sermon-aand. removal 79 Within; the: i flipperpertieneeiz the' easiestc o `theperio'rated plateSj 16a-nd ril? areapnli elfteeppeeteeideeend compressed into the pad by suiflcientlpressure so asfto amalgamate-thethree several `parts together?5 'Y `'whereby to form a unitaryV properlyjshaped i andi diniensionedlijpadgrl The; body 15 being somewhat plastic and .extending slightly beyond-the edges of plates 16-17 makes a seal- 1 ing fit within the walls ofthe casing when-U inserted.l 1 The pad and its perforated plates are pro*- vded with two transverse perfrations 18, *i `properly located, and of dimensions to neatly it'over the posts 10 and 12, and with an ap-.f i

proximate tight `binding fitwithin the upper p walls o f-the casing." As thus vmade and ap-` plied theventirepad maybeeasily insertedor or to removed, if it is desired to make repairs replace platesor other parts.

The combinationwith the p FrenchV chalk, of the dilute sulphuricacid, i effects a desirable reaction, rendering the pad sufficiently resistant'to *passagev of iiuid or of ordinary gas escape, at the sametimef'en-s'ir..

`tirely preventing sparking of the electrolyte in action. The reaction of the invested suie -phuric on the kieselguhr vand French chalkh.` l

is to solidify and harden the paid simila t0 10b that whichoccurs when the plate oxides aref:t

o o `,Siegerailieri" c isfalowerjandupperconfiningfplatel'l and 1. Y 1 .17 fTQSPeCUYe1YJOvpereratelrubber er other Y kieselguhr and *Y mixed with acid. It is therefore desirable'to Y completely form thev acid invested pad beforeV placing it in position in the battery cell. v y. `What I claim is: 1. In storage battery constructio1i,`acasing,` af'series of battery' plates fmountefdltherein, "a,

cover, and a coveriiigpad composed offfin'ely p "comminutedkieselguhr and French challnsat-v .l f urated with an acidandprovidedwith tightly plates in'holdin'g engagen'ieiit with thefp'ad,`

` the'top of the battery plates and the cover.v 2. In storage battery constructiongafcasing, Y 15 aseries of battery plates mounted therein, a

' cover, and a covering pad composedofcol'r'i-Vv minuted vkie'selguhr and F renchchalk satu- Y rated With: dilute sulphuricacid-and provided with tightly compressing upper? and lower 20 perforated :plates tightly engagingthev pad l 'andlocated'betweenltlietop vof tlie battery plates andthe cover;k -f' Y 3.l A'retaining pad for storagebatteries` s consisting of-a body'composedY o'finixed kie- 25 selguhrfand VFrench Vchalkl invested with a l dilute solutionof sulph'uric acid and having l outer confining plate'sof perfo'ratedmaterial tightly compressing the opposite sides ofV the pad and firmly invested fthere'vsfitlfify by intertlons. l

4. Aretainingpa'dflorl storage batteries consistingof' a bod composed of lav mixture of Ag about two arts'ofyfinely-comminutedkiesel- '13:5 guhranda outonepart Vofiinel comminuted French chalkinvested with a (iilute solution y'of sulphuricacid and having outer confining platesoferforatedlnaterial pressedinto its 'i' 'up eranV lowerfaces. v 40 n testimony *whereof I hereunto ax my I compressing upper; and'lowerl perforated; y

v said pad and its plates being located .betuvsfeeiiV s() looking engagement with the plate j' l 'Y 

